I have a similar problem but with the Nuendo Digi 9652 card.
I'm using WinXP (SP3), and driver 2.11 and can only get 2 ADAT outputs to work. I've only recently needed the third ADAT port and connected the Expansion port.
After connecting the expansion port only one output port on the PCI card is lit while the expansion card's output is also lit, or only two and not three ports are working. When I disconnect the expansion port both the output ports on the PCI card are lit.
I have the W52 installed in the card already. I also have a M52 Eprom, but thought the Digi9652 had 24 channels (3 ADAT ports).
Any idea on what the problem might be?
Thx